Francis prlsil



(N o Modem Y PRASIL. TRANSPORTABLE METALLIC BRIDGE.

Patented Peb. 27, 1894.

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' UNITED STATES PATENT FFICF..

FRANCIS PRSIL, OF PRAGUE, AUSTRIA-HUNGARY.

TRANSPORTABLE METALLIC BRIDGE.

SPECIFICATION forming part of Letters Patent No. 515,445, dated February27, 1894.

Application filed March 15,1893. Serial No. 466.060. (No model.)

To all whom ibm/ay concern:

Be it known that I, FRANCIS PEASIL, a subject of the Emperor ofAustria-Hungary, residing at Prague, Bohemia, Austrial-Iungary, haveinvented certain new and useful Iniprovements in Constructions forTransportable Metallic Bridges, of which the following is aspecification.

Myinvention relates particularly to the construction of the sectionscomposing the structure to be used in bridge building or for likepurposes and to themanner of securing said sections to each other.

In the drawings, Figures l, 2, 3, and 32L are diagrammatic views of thesections arranged in dierent ways to form different structures. Fig. 4,is a sectional detail view of the Inanner of joining two ot' the tubularsections. Fig. 5, is a detail sectional View of a Ineditication. Figs. 6and 7 are similar views of other modifications. Fig. 8, is a side viewshowing in detail the manner of uniting two triangular sections at theirapices. Figs. 9 and l0 show the tubular parts arranged in connectionwith a beam or girder.

Fig. l, represents an iron frame Work coinposed of'triangular sections bhaving flanges at their corners arranged to bear against each other.These sections are made np of tubular bars and they are held together atthe corners a by the right and left threaded coupling B, Fig. 4,engaging the right and left threaded ends l and 2 said coupling actingto draw the tubular ends of the sections into rm contact as shown inFig. 4. The couplingmay be turned by introducing a key BX through thetubular section last added to the structure to engage the coupling whichas shown lies entirely Within the tubular parts. The triangular sectionsare connected at their apices bx as shown in Fig. 8, by the headed boltQ and nut Q', the said sections having bosses q cast therewith uponwhich the bead and nut bear. Instead of having triangular sections theymay be of square or any other desired form as shownl in Fig. 3, wheresaid square sections form the central part of the structure combinedwith which are the triangular sections shown.

Instead of operating the right and left threaded coupling as in Fig. 4,said coupling may be formed with a central polygonal or flat sidedportion Z (see Fig. 7), over which its the rim or plate C to projectbeyond the tubes so that it may be turned to rotate the threadedcoupling and thus draw the two section ends 1 and 2 together or tightlyagainst the plate C.

In Fig. 6, the coupling has `a toothed central portion by which it maybe turned when engaged by a suitable implement introduced through theopening C formed between the meeting ends of the tubular ends ot' theparts l and 2. These parts may be solid bars or braces as shown in Fig.G,but the tubular ends constitute tubular sockets M, N, as shown. Whereone tubular part is larger than the other as in Fig. 5, the larger parthas a shoulder or ange l0, and the coupling instead of being threaded atboth ends is threaded only into the smaller tube its opposite end havinga head or ange 1l, to bear on the shoulder 10.

The cross braces T, Figs. 3, 3a, 9 and l0 are of I iron and areperforated to receive the ends'of the tubular parts as in Figs. 9 andl() or to receive the coupling which connects two opposing tubular endsand draws them into iirln Contact with the I iron, said ends havingflanges 12, as shown in Fig. 10.

Fig. 3 shows the mounting of my portable iron and steel structure forbridges and the like. The right hand part is held by the left hand part,which is firmly anchored upon the shore V. New sections are added bymeans of the crane R, which travels upon the 4upper bars.

l. A structure comprising the sections having tubular ends, the girdersperforated and fitting between the same and the coupling passing throughthe girder and connecting the tubular ends, substantially as described.

2. A structure comprising angular sections arranged with their apices incontact, the bosses q at the said apices and the bolts Q for connectingthe contiguous apices of the sections, substantially as described.

3. A structure comprising the angular sections arranged with theirapices in contact, the bolts Q for connecting the apices of the adjacentsections, said sections having tubular portions in line with each otherand the internal couplings for connecting said aligned portions,substantially as described.

In Witness whereof I have hereunto set my hand in presence of twoWitnesses. I

FRANCIS PRASIL.

Witnesses:

SAM. FISCHER, L. VOJACEK.

